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Kohnen, Thomas (2000). Corpora and speech acts: The study of performatives. In: Corpus Linguistics and Linguistic Theory, pp. 177-186. Amsterdam: Rodopi. ISBN 978-90-420-1493-0
Kohnen, Thomas (2006). Variability of form as a methodological problem in historical corpus analysis: the case of modal expressions in directive speech acts. In: Corpora and the History of English, pp. 221-233. Heidelberg: Winter.
Kohnen, Thomas and Mair, Christian (2012). Technologies of communication. In: The Oxford Handbook of the History of English, pp. 261-284. New York: Oxford University Press.